Rationalising the denominator
Remove a surd from the bottom of a fraction, with √k or a bracket like (b + √k) underneath.
You will be able to
- Rationalise a/√k and a/(b√k)
- Rationalise a/(b + √k) with the conjugate
- Write answers in the form p + q√k
25 minutes, 7 exam-style questions.